Intro to Deglutition & the Pharyngeal Constrictors [OINAs]

The video tutorial explains the process of deglutition, or swallowing, focusing on the anatomy and function of the pharynx and related muscles. It covers the role of the soft palate in preventing food from entering the nasopharynx, the function of pharyngeal constrictor muscles in moving food through the pharynx, and the anatomy of the larynx and esophagus. The tutorial also details the innervation and blood supply of these muscles, emphasizing the coordinated action required for effective swallowing.

What is the primary function of the palatoglossus muscle during swallowing?

• To open the esophagus

• To elevate the soft palate

• To constrict the pharynx

• To close the oropharyngeal isthmus

Which muscle is primarily responsible for elevating the soft palate?

• Palatoglossus

• Levator veli palatini

• Tensor veli palatini

• Stylopharyngeus

What is the role of the pharyngeal constrictor muscles during swallowing?

• To elevate the larynx

• To close the nasopharynx

• To open the esophagus

• To facilitate peristalsis

Which of the following is NOT a pharyngeal constrictor muscle?

• Palatopharyngeus

• Middle constrictor

• Superior constrictor

• Inferior constrictor

Where does the superior pharyngeal constrictor muscle insert?

• On the cricoid cartilage

• On the hyoid bone

• On the thyroid cartilage

• On the occipital bone

What is the primary function of the inferior pharyngeal constrictor?

• To open the nasopharynx

• To constrict the laryngopharynx

• To relax the esophagus

• To elevate the soft palate

Which nerve primarily innervates the pharyngeal constrictor muscles?

• Vagus nerve

• Trigeminal nerve

• Glossopharyngeal nerve

• Facial nerve

What is the role of the recurrent laryngeal nerve in the inferior pharyngeal constrictor?

• It innervates the cricopharyngeal part

• It supplies blood to the muscle

• It elevates the larynx

• It innervates the thyroid pharyngeal part

Which artery supplies blood to the pharyngeal constrictor muscles?

• Facial artery

• Ascending pharyngeal artery

• Inferior thyroid artery

• Superior thyroid artery

What is the function of the median pharyngeal raphe?

• To open the esophagus

• To close the nasopharynx

• To elevate the soft palate

• To connect the left and right constrictors